If you REALLY decide to get the abx (which I think are the devil and gave me and my daughter AWFUL systemic thrush that honestly cost me three months of my life in agony from my nipples and my intestines, not to mention my daughter's colic and digestion/food intolerances) remember to get a saline lock instead of the IV, so that they don't keep you hooked up. I would think a midwife would know that, but I don't know if the hospital has 'rules.'
Otherwise, I think the abx are honestly an awful drug, especially without PROM, and routine cervical checks make the abx less effective anyways, and increase the baby's risk of E. coli infection, which the abx don't treat. the rate of E coli infection increases with the use of the abx, because the good bacteria which usually compete with the E coli are killed by the abx.
Also, probiotics. If you get the abx (or really, just because, they can't hurt!) make sure to repopulate your body with good bacteria to fight thrush/yeast and all sorts of nasties. Baby needs it to. We're giving Nature's Way Children's formula to baby within the first hour of being born; that way we don't have to go through the awful issues we had with my first DD, which took months to fix, even after we finally discovered the problem.
I've written my novel, but I did the research before DD was born, and then got bullied into the abx anyways. It's one of my biggest regrets.
Oh, and don't let them give you the 'we need to keep the baby for 48 hours if you decline the abx' crap. Because it is just that. Infection is rare, and easy to diagnose, especially if you're not a first-time mom.